C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST12:01:25

2001A&A...379..917T - Astronomy and Astrophysics, volume 379, 917-923 (2001/12-1)

Statistics and supermetallicity: The metallicity of Mu Leonis.


Abstract (from CDS):

For the often-studied ``SMR'' giant µ Leo, Smith & Ruck (2000A&A...356..570S) have recently found that [Fe/H]~+0.3dex. Their conclusion is tested here in a ``statistical'' paradigm, in which statistical principles are used to select published high-dispersion µ Leo data and assign error bars to them. When data from Smith & Ruck and from Takeda et al. (1998PASJ...50...97T) are added to a data base compiled in 1999, it is found that conclusions from an earlier analysis (Taylor, 1999A&A...344..655T) are essentially unchanged: the mean value of [Fe/H]~+0.23±0.025dex, and values ≤+0.2dex are not clearly ruled out at 95% confidence. In addition, the hypothesis that [Fe/H]≥+0.3dex which emerges from the Smith-Ruck analysis is formally rejected at 98% confidence. The ``default paradigm'' which is commonly used to assess µ Leo data is also considered. The basic characteristics of that paradigm continue to be a) unexplained exclusion of statistical analysis, b) inadequately explained deletions from an [Fe/H] data base containing accordant data, and c) an undefended convention that µ Leo is to have a metallicity of about +0.3dex or higher. As a result, it seems fair to describe the Smith-Ruck application and other applications of the default paradigm as invalid methods of inference from the data.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: individual: µ Leo

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2695 0
2 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1049 1
3 * mu. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 405 0

    Equat.    Gal    SGal    Ecl

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